package com.digg55.app;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

/***

* @author hwp

* 6/11/2010 16:58

* DomXMLString.java

* 概述：纯java方式访问远程WebService接口返回的xml格式的数据保存在本地

*/

public class DomXMLString {

	private static String SERVICES_HOST = "www.webxml.com.cn";

	//远程WebService接口url

	private static String NETDATA_URL = "http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx/getRegionProvince";

	//访问远程WebService接口返回的xml格式的数据保存在本地的绝对路径

	private static String LOCAL_PC_SAVEFILE_URL = "c:\\netDataToLocalFile.xml";

	private DomXMLString() {
	}

	public static void main(String[] args) throws Exception {

		Document document = getProvinceCode(NETDATA_URL);

		helloOK(document, LOCAL_PC_SAVEFILE_URL);

	}

	/*返回一个Document对象*/

	public static Document getProvinceCode(String netXMLDataURL) {

		Document document = null;

		DocumentBuilderFactory documentBF = DocumentBuilderFactory.newInstance();

		documentBF.setNamespaceAware(true);

		try {

			DocumentBuilder documentB = documentBF.newDocumentBuilder();

			InputStream inputStream = getSoapInputStream(netXMLDataURL); //具体webService相关

			document = documentB.parse(inputStream);

			inputStream.close();

		} catch (DOMException e) {

			e.printStackTrace();

			return null;

		} catch (ParserConfigurationException e) {

			e.printStackTrace();

			return null;

		} catch (SAXException e) {

			e.printStackTrace();

			return null;

		} catch (IOException e) {

			e.printStackTrace();

			return null;

		}

		return document;

	}

	/*返回InputStream对象*/

	public static InputStream getSoapInputStream(String url) {

		InputStream inputStream = null;

		try {

			URL urlObj = new URL(url);

			URLConnection urlConn = urlObj.openConnection();

			urlConn.setRequestProperty("Host", SERVICES_HOST); //具体webService相关

			urlConn.connect();

			inputStream = urlConn.getInputStream();

		} catch (MalformedURLException e) {

			e.printStackTrace();

		} catch (IOException e) {

			e.printStackTrace();

		}

		return inputStream;

	}

	/*访问远程(WebService)xml数据后返回的xml格式字符串并生成为本地文件*/

	public static void helloOK(Document document, String savaFileURL) {

		TransformerFactory transF = TransformerFactory.newInstance();

		try {

			Transformer transformer = transF.newTransformer();

			DOMSource source = new DOMSource(document);

			transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");

			transformer.setOutputProperty(OutputKeys.INDENT, "YES");

			PrintWriter pw = new PrintWriter(new FileOutputStream(savaFileURL));

			StreamResult result = new StreamResult(pw);

			transformer.transform(source, result);

			System.out.println("生成xml文件成功!");

		} catch (TransformerConfigurationException e) {

			System.out.println(e.getMessage());

		} catch (IllegalArgumentException e) {

			System.out.println(e.getMessage());

		} catch (FileNotFoundException e) {

			System.out.println(e.getMessage());

		} catch (TransformerException e) {

			System.out.println(e.getMessage());

		}

	}

}